Toyota Tundra. Manual — part 2394

Engine and ECT

DATA LIST

2. PERFORM ACTIVE TEST

HINT:

Using the Techstream to perform the Active Tests allows relays, VSVs and actuators and other items to
be operated without removing any parts. This non-intrusive functional inspection can be very useful
because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active
Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed
while performing Active Tests.

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the Techstream on.

d. Enter the following menus: Body Electrical/Air Conditioner/Active Test.

e. According to the display on the Techstream, perform the "Active Test".

Air Conditioner

ACTIVE TEST REFERENCE

Temperature Shift +2 C, +1 C, Normal, -1 C, -2 C, -

3 C

displayed

-

Destination

Destination/DOMEST, USA,
EUROPE, AUSTRAL,
MIDEAST, NO INFO

Changes value with
destinations

-

Number of Trouble

Codes

Number of trouble codes/Min.: 0,
Max.: 255

Number of DTCs will be
displayed

-

Tester

Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

A/C Signal

Air conditioning switch signal/ON or

OFF

ON: Air conditioning ON
OFF: Air conditioning
OFF

-

Tester Display

Test Part

Control Range

Diagnostic

Note

Blower Motor

Blower motor

Min.: 0, Max.:

31

-

Magnetic Clutch Relay

Magnetic clutch relay

ON or OFF

-

Air Mix Servo Targ Pulse

(D)

Driver side air mix servo motor

pulse

Min.: 5, Max.:

104

-

Air Mix Servo Targ Pulse

(P)

Passenger side air mix servo motor

pulse

Min.: 6, Max.:

105

-

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

DIAGNOSTIC TROUBLE CODE CHART

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of
the code, refer to the links below.

Air conditioning system

DIAGNOSTIC TROUBLE CODE CHART

Air Outlet Servo Pulse (D)

Driver side air outlet servo motor

pulse

Min.: 9, Max.:

97

-

Air Inlet Damper Targ

Pulse

Air inlet damper target pulse

Min.: 7, Max.:

28

-

Cool Air Bypass Pulse

Driver side cool air bypass pulse

Min.: 8, Max.:

50

-

DTC

Detection Item

Trouble Area

B1411/11

Room Temperature Sensor Circuit



Room temperature sensor



Harness and connector
between room temperature
sensor and air conditioning
amplifier



Air conditioning amplifier

B1412/12

Ambient Temperature Sensor
Circuit



Ambient temperature sensor



Harness or connector
between ambient temperature
sensor and air conditioning
amplifier



Air conditioning amplifier

B1413/13

Evaporator Temperature Sensor
Circuit



No. 1 cooler thermistor
(evaporator temperature
sensor)



Air conditioning harness



Air conditioning amplifier

B1421/21

Solar Sensor Circuit (Passenger
Side)



Automatic light control
sensor (solar sensor)



Harness and connector
between solar sensor and air
conditioning amplifier



Harness and connector
between solar sensor and
main body ECU

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra



Main body ECU



Air conditioning amplifier

B1422/22

Compressor Lock Sensor Circuit



Air conditioning compressor
(lock sensor)



Compressor drive belt



Harness and connector
between air conditioning
compressor (lock sensor) and
air conditioning amplifier



Air conditioning amplifier



CAN communication system

B1423/23

Pressure Sensor Circuit



Air conditioning pressure
switch



Harness and connector



Air conditioning amplifier

B1424/24

Solar Sensor Circuit (Driver Side)



Automatic light control
sensor (solar sensor)



Harness and connector
between solar sensor and air
conditioning amplifier



Harness and connector
between solar sensor and
main body ECU



Main body ECU



Air conditioning amplifier

B1441/41

Air Mix Damper Control Servo
Motor Circuit (Passenger Side)



Air mix servo motor (for
passenger side)



Air conditioning harness



Air conditioning amplifier

B1442/42

Air Inlet Damper Control Servo
Motor Circuit



Air inlet servo motor



Air conditioning harness



Air conditioning amplifier

B1443/43

Air Outlet Damper Control Servo
Motor Circuit



Air outlet servo motor



Air conditioning harness



Air conditioning amplifier

B1445/45

Passenger Side Cool Air Bypass
Damper Control



Cool air bypass servo motor



Air conditioning harness



Air conditioning amplifier



Air mix servo motor (for

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

ACTUATOR CHECK

1. ACTUATOR CHECK

a. Turn the ignition switch ON while pressing the A/C control AUTO switch and Recirculation/Fresh

switch simultaneously.

Fig. 27: Identifying A/C Control Auto Switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Press the Recirculation/Fresh switch.

c. As each damper, motor and relay automatically operate the actuator check at 1 second intervals

from step No. 1 to No. 10 continuously, check the temperature and airflow visually and by hand.

HINT:



If a slower display is desired, press the driver temperature up switch and change the display
in the step operation. Each time the driver temperature up switch is pressed, the display
changes by 1 step.



The buzzer sounds when the displayed trouble code changes.



Codes are displayed from smaller to larger numbers in order.



To cancel the check mode, press the "OFF" switch.

B1446/46

Air Mix Damper Control Servo
Motor Circuit (Driver Side)

driver side)



Air conditioning harness



Air conditioning amplifier

B1497/97

BUS IC Communication
Malfunction



Air conditioning harness



Air conditioning amplifier

B1499/99

Multiplex Communication Circuit CAN communication system

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra